In depth comparison and review of ASUS ZenBook S UX391UA (ET087T) and ASUS ZenBook 13 (UX331FAL). Compare sizes, performance, storage capacities, batteries and other important specifications and features to easily choose the right laptop for you. Our goal is to help you uncover differences between the products and find the laptop that will best fit your needs.
| DESIGN AND DIMENSIONS | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Product Type | Notebook | Notebook |
|---|---|---|
| Dimensions (WxDxH) | 31.1 cm x 21.3 cm x 1.29 cm | 31 cm x 21.6 cm x 1.39 cm |
| Weight | 1 kg | 990 g |
| Colour | Deep dive blue | Deep dive blue |
| DISPLAY | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Screen Size (Type) | 13.3" | 13.3" |
|---|---|---|
| LCD Backlight Technology | LED backlight | LED backlight |
| Screen Resolution | 1920 x 1080 (Full HD) | 1920 x 1080 (Full HD) |
| Widescreen | Yes | Yes |
| Image Aspect Ratio | 16:9 | 16:9 |
| Image Brightness | 300 cd/m² | 300 cd/m² |
| Colour Gamut | 72% NTSC | 100% sRGB, 72% NTSC |
| Features | Ultra Slim Design, anti-glare, WideView, 178° horizontal and vertical viewing angle | ASUS Splendid Video Intelligence Technology, anti-glare, WideView, 178° horizontal and vertical viewing angle, NanoEdge display, 72% NTSC colour gamut |
| PROCESSOR | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| CPU | Intel Core i7 (8th Gen) 8550U / 1.8 GHz | Intel Core i5 (8th Gen) 8265U / 1.6 GHz |
|---|---|---|
| Max Turbo Speed | 4 GHz | 3.9 GHz |
| Number of Cores | Quad-Core | Quad-Core |
| Cache | 8 MB | 6 MB |
| 64-bit Computing | Yes | Yes |
| Features | Intel Turbo Boost Technology 2.0 | - |
| MEMORY | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| RAM | 8 GB (provided memory is soldered) | 8 GB (provided memory is soldered) |
|---|---|---|
| RAM Type | LPDDR3 SDRAM | LPDDR3 SDRAM |
| Speed | 2133 MHz | - |
| Rated Speed | 2133 MHz | - |
| STORAGE | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Main Storage Size (HDD/SSD) | 256 GB SSD M.2 SATA 6Gb/s | 256 GB SSD M.2 PCIe - NVM Express (NVMe) |
|---|
| AUDIO & VIDEO | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Graphics Processor (GPU) | Intel UHD Graphics 620 | Intel UHD Graphics |
|---|---|---|
| Camera | Yes - HD | Yes - VGA |
| Sound | Harman/kardon stereo speakers, array microphone | Harman/kardon stereo speakers, array microphone |
| Audio Features | ASUS SonicMaster | ASUS SonicMaster, ASUS Bang & Olufsen ICEpower |
| COMMUNICATIONS | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Wireless | 802.11a/b/g/n/ac, Bluetooth 4.2 | 802.11a/b/g/n/ac, Bluetooth 4.2 |
|---|
| BATTERY | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Technology | 4-cell | 3-cell Lithium Ion |
|---|---|---|
| Battery Capacity (Size) | 50 Wh | 50 Wh |
| Battery Life | Up to 13.5 hours | - |
| AC ADAPTER | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Input | AC 120/230 V (50/60 Hz) | AC 120/230 V (50/60 Hz) |
|---|---|---|
| Output | 65 Watt, 20 V | 45 Watt, 19 V, 2.37 A |
| INPUT | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Type | Keyboard, touchpad | Keyboard, touchpad |
|---|---|---|
| Keyboard Backlight | Yes | Yes |
| CONNECTIONS & EXPANSIONS | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Interfaces | Headphone/microphone combo jack USB-C 3.1 Gen 1 (Power Delivery/data/video) 2 x USB-C 3.1 Gen 2 (supports Thunderbolt 3) (Power Delivery/data/video) |
Headphone/microphone combo jack 2 x USB 3.2 Gen 1 USB-C 3.1 Gen 1 HDMI |
|---|---|---|
| Memory Card Reader | - | Yes (microSD, microSDHC, microSDXC) |
| SOFTWARE | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Operating System (OS) | Windows 10 Home | Windows 10 Pro |
|---|
| MISCELLANEOUS | ASUS ZenBook S UX391UA (ET087T) | ASUS ZenBook 13 (UX331FAL) |
|---|
| Included Accessories | USB-C power adapter | Power adapter |
|---|---|---|
| Security | Firmware Trusted Platform Module (TPM) Security Chip | Firmware Trusted Platform Module (TPM) Security Chip, fingerprint reader |
| Model Number | - | EG075R |
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